A127538 - cp's OEIS frontend

A127538 Triangle read by rows: T(n,k) is the number of ordered trees with n edges having k odd-length branches starting at the root (0<=k<=n).

n	a(n)
0	1
1	0
2	1
3	1
4	0
5	1
6	0
7	4
8	0
9	1
10	3
11	3
12	7
13	0
14	1
15	3
16	22
17	6
18	10
19	0
20	1
21	16
22	43
23	50
24	9
25	13
26	0
27	1
28	37
29	175
30	101
31	87
32	12
33	16
34	0
35	1
36	134
37	503
38	448
39	177
40	133
41	15
42	19
43	0
44	1
45	411
46	1784
47	1305
48	862
49	271
50	188
51	18
52	22
53	0
54	1
55	1411
56	5887
57	4848
58	2524
59	1444
60	383
61	252
62	21
63	25
64	0
65	1
66	4747
67	20604

[1, 0, 1, 1, 0, 1, 0, 4, 0, 1, 3, 3, 7, 0, 1, 3, 22, 6, 10, 0, 1, 16, 43, 50, 9, 13, 0, 1, 37, 175, 101, 87, 12, 16, 0, 1, 134, 503, 448, 177, 133, 15, 19, 0, 1, 411, 1784, 1305, 862, 271, 188, 18, 22, 0, 1, 1411, 5887, 4848, 2524, 1444, 383, 252, 21, 25, 0, 1, 4747, 20604]

cp's OEIS Frontend

A127538 Triangle read by rows: T(n,k) is the number of ordered trees with n edges having k odd-length branches starting at the root (0<=k<=n).

Table of values

List of values